Question

unannounced adj.未经宣布的;未通知的;

Accepted Answer

英[ˌʌnəˈnaʊnst]  美[ˌʌnəˈnaʊnst] ADJ未事先通知的；未提前说明的；未打招呼的If someone arrives or does something unannounced, they do it unexpectedly and without anyone having being told about it beforehand.例：He had just arrived unannounced from South America...他刚刚从南美来到这里，事先没有打招呼。例：My first night in Saigon I paid an unannounced visit to my father's cousins.到西贡的第一个晚上，我给父亲的堂兄堂弟们来了个突然袭击。

单词	unannounced
音标	英[ˌʌnəˈnaʊnst] 美[ˌʌnəˈnaʊnst]
解释	adj.未经宣布的;未通知的;
例句	ADJ 未事先通知的；未提前说明的；未打招呼的 If someone arrives or does something unannounced, they do it unexpectedly and without anyone having being told about it beforehand. 例：He had just arrived unannounced from South America...他刚刚从南美来到这里，事先没有打招呼。例：My first night in Saigon I paid an unannounced visit to my father's cousins.到西贡的第一个晚上，我给父亲的堂兄堂弟们来了个突然袭击。
变形

Unannounced 英[ˌʌnəˈnaʊnst 美[ˌʌnəˈnaʊnst Adj.未经宣布的;未通知的 Adj 未事先通知的；未提前说明的；未打招呼的 Arrives Unexpectedly